The DZL series new water-fire tube boiler is a new eco-friendly and energy-saving product co-developed by our company and Professor Li Zhiguang—a famous boiler expert, professor of Harbin Institute of Technology and director of Beijing Institute of Light Boiler. It is called as a revolution of industrial boilers by domestic and foreign experts. It adopts the advanced water circulation technology, it improves water circulation speed of high temperature zone, increases the flow of bottom water, and avoids sundries deposition and scaling, with stronger water quality adaptability than other furnaces.

Product details

I. Sufficient and Steady Capacity                                            
With efficient diabatic spirally corrugated tube, it is designed by using heat transfer and flow resistance technologies of Harbin Institute of Technology. The boilers actual capacity is ****5% higher than name plate capacity. As the physical dimension and smoke speed of the spirally corrugated tube are rational, and the spirally corrugated tube doesnt form soot or wear when the boiler normally operates, the boilers capacity and heat efficiency dont reduce with the extension of operating time;                                            
II. Rapid Warming and High Heat Efficiency                                            
The main heating surface is installed in the shell, so it doesnt leak cold air to the smoke side, and nearly a half of shell surface is heated. The boilers heating up time is one third shorter than other furnaces, and heat efficiency is the highest in various furnaces;                               III. Low Original Dust Discharge Concentration, Environmental Protection and Energy Conservation                                            
It uses new arch and hearth with large volume, the rear of the hearth has a dust separation reversing chamber, and the unburned dust particles fall to the hearth for secondary combustion, corresponding to primary dedusting in the furnace. Therefore, it ensures that the original dust discharge concentration is lower than national permissible value, reducing fuel consumption, and protecting the environment;                                            
IV. High Steam Quality                                            
The optimally designed feeding apparatus reduces overhigh water level in shell high temperature zone due to overheat; the optimally designed steam separator facilitates vapour gravity separation, and makes the steam humidity lower than 1%, obviously lower than national standard of 4%;                                            
V. Strong Water Quality Adaptability                                            
By adopting the advanced water circulation technology, it improves water circulation speed of high temperature zone, increases the flow of bottom water, and avoids sundries deposition and scaling, with stronger water quality adaptability than other furnaces, reducing fuel consumption, and improving operating time;                                            
VI. Small Overall Dimensions and Low Boiler Room Investment Cost                    
The main heating surface is installed in the shell, and small capacity boiler can cancel the rear heating surface. Its overall dimension is obviously smaller than other boilers. The boiler below **0tons (*0MW) can be arranged in single layer, making the investment of the boiler room save more than *0% than other types;                    
 VII. Low Operating Cost, Safety and Reliability                    
The adoption of advanced water circulation technology and optimization of boiler structure improve the operating conditions of the high temperature tube plate, water wall tube and shell bottom. In normal water quality condition, it doesnt cause tube explosion, tube plate cracking or shell bottom bulge. As the boiler has large water capacity, it doesnt need special protective measures in sudden power failure, and prevents damage accidents of heating surface and shell medium due to vaporization. The safe reliability is guaranteed, and operating cost is far lower than other furnaces;                    
 VIII. Short Installation Time, Low Installation Cost                    
There are fast-delivery, assembly and semi-assembly type delivery model. the installation period and cost can be lower by over *0%.                    

Prodcut structure

1.Water-fire tube structure
2.Wing-shape smoke flue
3.Spirally thread smoke pipe
4.Chain grate

Product parameter table
 

DZL Series Steam Boiler Technology Parameter Table
Boiler Model	Rated  capacity	Rated pressure	Feed water temperature	Steam temperature	Active grate area	Exhaust gas temp.	Design efficiency	Fuel consumption	Main part weight	Main part dimensions	Delivery Mode
	t/h	MPa	℃	℃	㎡	℃	%	Kg/h	Ton	mm
DZL**1.*-AII	1	1	*0	**4	1.*5	**7	*0	**8	*4.2	***8×***0×***2	Package
DZL**1.**-AII	2	1.*5	*0	**4	3.4	**3	*0	**8	*3.2	***0×***0×***6	Package
DZL**1.**-AII	4	1.*5	*0	**4	5.*8	**0	*0	**2	*8	***9×***0×***4	Package
DZL**1.**-AII	6	1.*5	*0	**4	7.*5	**6	*0	**5	*7.6	***5×***0×***4	Package
DZL***1.**-AII	*0	1.*5	**5	**4	*2	**1	*0	***8	*6	***6×***3×***1	Assembled
DZL***1.**-AII	*5	1.*5	**5	**4	*8	**1	*1	***8	*8.8	***0×***0×***0	Assembled
DZL***1.**-AII	*0	1.*5	**5	**4	*2.9	**0	*1	***1	*9.1	***5×***3×***7	Assembled and Semi-Assembled
DZL***1.**-AII	*0	1.*5	**5	**4	*7.5	**7.6	*1	***0	*5.6	***2x***0x***0	Semi-Assembled